Canadensis, Mx. (Hemlock.) Large tree, used for ornamental and Hedging purposes. Largely used for lumber.

OF WESTCHESTER COUNTY.

Larix, Tourn. (Larch.)

L. Americana, Mx. (Larch, Black Larch, Hackmatack, Tamarack.) A large tree, used for ornamental purposes, and for lumber.

Thuja, Tourn. (Arbor Vita?.)

T. occidental is, L. (American Arbor Vitse.) This tree is also called Cedar, in the north where it is used in the manufacture of barrels. It is a favorite ornamental tree ; largely used in hedges.

Juniperus, L. (Juniper.)

J. Virginiana, L. (Red Cedar.) A tree from 15 to 40 feet high in these limits ! wood is close-grained and takes a good polish ; makes durable fence posts.

GLASS II.-M0N0C0TYLED0N0US OR ENDOGENOUS PLANTS. Order 107-- ARACE.E, (Arum Family.)

Arisaama, Martius. (Indian Turnip.) A. triphyllum, Torr. Damp places.

Peltandra, Raf.

P. Virginica, Raf. Shoal water, or very wet places. (Leggett.)

Calla, L. (Water Arum.)

C. palustris, L. Cold swampy land. Sing Sing, (Dr. Fisher.)

Symplocarpus, Salisb. (Skunk Cabbage.)

S. fcetidus, Salisb. Damp grounds ; common

Acorus, L. (Sweet Flag. Calamus.)

A. Calamus, L. Margins of small streams in swampy places.

Order 10S.-LEMNACE.iE. (Duckweed Family.)

Lemna, L. (Duckweed. Duck's-meat.) Li. polyrrhiza, L. Ponds. (Leggett.)

Order 109.-- TYPHACEE. (Cat-tail Family.)

Typha, Tourn. (Cat-tail Flag.) T. latifolia, L. Wet places. T. angustifolia, L. Wet places.

Sparganium, Tourn. (Bur-reed)

S. eurycaqium, Engelm. (Bicknell.) S. simplex, Hudson. Not rare.

814 REPORT OF THE FLORA

Order 110.-- NAIDACE2E. (Pondweed Family.)

Naias, I.. (Naiad.)

N. flexilis, Rostk. (Bicknell.)

Zannichellia, Micheli. (Horned rondweed.)

Z. palustris, L. Lower part of the county, now New York. (Bicknell.)